To prevent overheating damage

Figure 4-7. Adjusting Starter Pinion Clearance

TM-9-6115-604-34 Generator Set Diesel Engine Driven Tactical Skid Mtd 5 Kw. 1 Phase-2 Wire 1 Phase -3 Wire 3 Phase -4 Wire 120. 120/240 and 120/208 Volts Manual
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TM 9-6115-604-34 NAVFAC P-8-633-34 (11) Install the spring retainer washer (11), protector bellows (10), recessed washer (9), plunger spring (8), and o recessed washer (7) over plunger (12), and secure with snap ring (6). (12) Install the plunger (12) through the shaft lever (15), and install the plunger rod nut (5) on the shaft until several threads are engaged. (13) Install the electrical solenoids B1 L3 or B2L4 (13) over plunger (12), and into the protector bellows (10). Secure the electrical solenoids B1 L3 or B2L4 to the field frame (64) with the machine bolts (3). (14) Position terminal lug (53) over the field terminal on electrical solenoids B1L3 or B2L4 (13), install hexagonal nut (37), and tighten it, and the other hexagonal nut (37) (installed in step c(39), above), to 20 to 25 pound-feet (27 to 34 newton-meters). (15) Check and adjust the pinion end clearance as follows: CAUTION To prevent overheating damage to the windings, do not energize the hold-in windings longer than 30 seconds. If the adjustment cannot be made In this time, disconnect the battery and allow the windings to cool. (a) Energize the hold-in windings in the electrical solenoids by connecting a 24 V dc battery to the G and S terminals, and momentarily energize the pull-in windings by flashing a jumper lead from the G to the MTR terminal (A, Figure 4-7). Do not leave the jumper lead connected. The hold-in windings will keep the solenoid plunger in the operating position as long as the battery is connected between the G and S terminals. (b) Push the drive assembly towards the commutator end of the starter to remove slack and measure the pinion clearance (B, Figure 47). (c) Turn the plunger rod nut (5, Figure 4-3) as necessary to achieve a pinion clearance of 0.328 to 0.390 inch (8.33 to 9.91 mm). (d) When the adjustment has been completed, disconnect the battery from the G and S terminals. (16) Install the terminal lead (4, Figure 43). (17) Using a new inspection plug gasket (2) install brush inspection plug (1). (18) Install the starter motors B1 and B2 in accordance with the Operator and Organizational Maintenance Manual. 4-16

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